JP2011520494A - Wet wiper for disinfection - Google Patents

Abstract

According to the present invention, there is provided a wet wiper for sterilization made of a nonwoven web material and containing a sterilizing solution. The sterilizing solution contains a peracid and a peroxide that can act synergistically to be effective against the pathogen when exposed to the pathogen. In order to stabilize the sterilizing solution over time (eg during storage), various aspects of the wiper are selectively adjusted according to the present invention. For example, the nonwoven web material used for the wiper is made from a synthetic polymer and is relatively hydrophobic. While not intending to be bound by theory, it is believed that such materials have a lower peroxide / peracid reduction potential than cellulosic materials. This suppresses significant decomposition of the peroxide or peracid contained in the sterilizing solution. Also, one or more surfactants are included in the germicidal solution to improve the wettability of the nonwoven web material. It has also been unexpectedly discovered by the inventors that certain surfactants improve the stability of the solution in addition to improving the wettability.
[Selection] Figure 1

Description

  The present invention relates to a wet wiper for sterilization.

(Related application)
This application claims priority from US Provisional Application No. 61 / 053,360, filed Mar. 15, 2008.

  It is well known in the art that solutions containing peroxides and peracids are bactericidal (eg, bactericidal, fungicidal, virucidal, bactericidal, bactericidal, sporicidal, etc.) Yes. Unfortunately, however, peracids and peroxides have a relatively high energy state and therefore tend to decompose easily in solution. This unstable nature of peracids and peroxides is increased when incorporated into other materials such as wet wipers. The inventors believe that, for example, due to the reduction potential of the cellulose-based materials cellulose, hemicellulose and lignin, in fact, accelerated degradation of peracids and peroxides in the bactericidal solution is actually caused. ing. Therefore, there is a current need for a technique for incorporating a sterilizing solution into a wiper so as to exhibit a very effective sterilizing property and maintain a stable state.

U.S. Pat.No. 5,527,892 U.S. Pat.No. 5,770,543

  In accordance with one embodiment of the present invention, a sanitizing wet wiper is disclosed comprising a substantially hydrophobic nonwoven web material comprising a synthetic polymer capable of melt extrusion. The wiper of the present invention also includes a sterilizing solution present in an amount of about 150 wt% to about 1000 wt%, based on the dry weight of the nonwoven web material. The sterilizing solution includes from about 0.01% to about 2% by weight of at least one peracid, from about 0.5% to about 15% by weight of at least one peroxide, and from about 0.001% by weight. To about 2% by weight of at least one surfactant.

  Other features and aspects of the present invention are described in more detail below. In the following part of the specification, including reference to the accompanying drawings, the invention, including the best mode, is disclosed in more detail to the extent that those skilled in the art can practice it.

It is the schematic of one Embodiment for producing the meltblown web used for the wet wiper of this invention.

  Definition

  The term “nonwoven web” as used herein generally interlaces individual fibers or yarns in ways that are different from distinct (regular) aspects such as woven fabrics. It refers to a web having a structure. Examples of suitable nonwoven webs include, but are not limited to, meltblown webs, spunbond webs, bonded carded webs, and the like.

  As used herein, the term “meltblown web” generally refers to a melted thermoplastic material as a molten fiber from a plurality of fine die capillaries, usually having a circular cross-sectional shape, as a convergent high velocity gas (eg, Air) refers to a nonwoven web formed by a method in which the diameter of the thermoplastic material fibers extruded in the stream is reduced to the extent of the fine fiber diameter. The meltblown fibers are then carried by the convergent high velocity gas stream and deposited on the collection surface to form an irregularly dispersed meltblown fiber web. Such a method is disclosed, for example, in US Pat. No. 3,849,241 by Butin et al., Which is hereby incorporated by reference in its entirety for all purposes.

  As used herein, the term “spunbond web” generally refers to a web comprising small diameter substantially continuous fibers. The fiber is formed by extruding a molten thermoplastic material from a plurality of fine capillaries having a generally circular cross-sectional shape of a spinneret (spinneret), for example, a diameter reducing device and / or other known devices. It is produced by rapidly reducing the diameter with a spunbond apparatus. For example, U.S. Pat.No. 4,340,563 by Appel et al., U.S. Pat.No. 3,692,618 by Dorschner et al., U.S. Pat.No. 3,802,817 by Kintsuki, U.S. Pat.No. 3,338,992 by Kinney, U.S. Pat. U.S. Pat.No. 3,502,763 by Hartman, U.S. Pat.No. 3,502,538 by Levy, U.S. Pat.No. 3,542,615 by Dobo et al., And U.S. Pat. This reference is hereby incorporated by reference in its entirety for all purposes). Spunbond fibers are generally not tacky when deposited on a collection surface. Spunbond fibers may have a diameter of less than about 40 microns, often about 5 to 20 microns.

  Detailed description

  Reference will now be made in detail to various embodiments of the invention, one or more examples of which are set forth below. Each example is provided to illustrate an embodiment of the invention and is not intended to limit the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit or scope of the invention. For example, additional embodiments may be obtained by using features described or described as part of one embodiment in another embodiment. Accordingly, the present invention is intended to include the modifications and variations described above.

  Generally speaking, the present invention relates to a sanitizing wet wiper made of a nonwoven web material and containing a sterilizing solution. The sterilizing solution contains a peracid and a peroxide that can act synergistically to be effective against the pathogen when exposed to the pathogen. In order to stabilize the sterilizing solution over time (eg during storage), various aspects of the wiper are selectively adjusted according to the present invention. For example, the nonwoven web material used for the wiper is made from a synthetic polymer and is relatively hydrophobic. While not intending to be bound by theory, it is believed that such materials have a lower peroxide / peracid reduction potential than cellulosic materials. This suppresses significant decomposition of the peroxide or peracid contained in the sterilizing solution. Also, one or more surfactants are included in the germicidal solution to improve the wettability of the nonwoven web material. It has also been unexpectedly discovered by the inventors that certain surfactants improve the stability of the solution in addition to improving the wettability.

  Hereinafter, various embodiments of the present invention will be described in more detail.

  I. Sterilizing solution

  A. Organic peracid

The organic peracid used in the sterilizing solution is a peroxide derivative of one or more carboxylic acids. Suitable organic peracids, for _example, C 1 -C ₉ peracid may especially include _C 1 -C ₅ peracid. Examples of such peracids include performic acid, peracetic acid, perbenzoic acid, perpropionic acid, pernonanoic acid, and halogen-substituted peracids (eg, monochloroperacetic acid, dichloroperacetic acid, trichloroperacetic acid, trifluoro Peracetic acid, metachloroperoxybenzoic acid), and mixtures thereof.

  B. Peroxide

  In addition to the peracid, the sterilizing solution contains hydrogen peroxide or other peroxide capable of releasing hydrogen peroxide when present in the solution. Suitable hydrogen peroxide sources include, for example, alkali metal or alkaline earth metal peroxides, organic peroxy compounds, pharmaceutically acceptable salts thereof, and mixtures thereof. Examples of the alkali metal or alkaline earth metal peroxide include lithium peroxide, potassium peroxide, sodium peroxide, magnesium peroxide, calcium peroxide, barium peroxide, and mixtures thereof. Organic peroxy compounds include carbamide peroxide (also known as urea peroxide), alkyl and / or allyl peroxide (eg, tert-butyl peroxide, diphenyl peroxide, etc.), alkyl and / or allyl ketone peroxide (eg, Benzoyl peroxide), peroxyesters, diacyl peroxide, and mixtures thereof.

  Peroxide content in the sterilizing solution is generally from about 0.5% to about 15% by weight, in some embodiments from about 1% to about 10%, and in some embodiments about 2% to about 8% by weight, and in some embodiments about 3% to about 6% by weight. Similarly, the peracid content in the sterilizing solution is generally from about 0.01 wt% to about 2 wt%, and in some embodiments from about 0.05 wt% to about 1 wt%, In embodiments, it is about 0.1% to about 0.5% by weight. It should be understood that the above concentrations are initial concentrations immediately after preparation of the sterilizing solution. Since peracids and peroxides can be decomposed in water, the concentration of peracids and peroxides can change over time. For example, urea peroxide decomposes into urea and hydrogen peroxide in an aqueous solution. Hydrogen peroxide can be further broken down into water and oxygen. Similarly, peracetic acid can react with water in solution to produce acetic acid and hydrogen peroxide. Nevertheless, one of the advantages of the present invention is that the peroxide and peracid can be sufficiently stabilized at equilibrium so that the concentration of peroxide and peracid is maintained over a period of time. It can be maintained at substantially the same concentration. For example, the concentration of hydrogen peroxide is still from about 0.5 wt% to about 15 wt%, in embodiments from about 1 wt% to about 10 wt%, even after 30 days at room temperature (~ 25 ° C). In some embodiments from about 2% to about 8%, and in some embodiments from about 3% to about 6%. Similarly, the concentration of peracid remains from about 0.01 wt% to about 2 wt%, in embodiments from about 0.05 wt% to about 1 after 30 days at room temperature (~ 25 ° C). % By weight, and in some embodiments from about 0.1% to about 0.5% by weight.

  C. Surfactant

  The sterilizing solution of the present invention also includes at least one surfactant to enhance the wettability of the nonwoven web material. In general, any surfactant can be used as long as it can improve wettability without interacting with hydrogen peroxide or peracid in the solution to the extent that it significantly affects the stability of the solution. Can be used.

Non-ionic surfactants generally lack formally charged negative or positive ionic groups that can react with peroxides, so such surfactants should be used in disinfecting solutions. Is desirable in some cases. Nonionic surfactants are generally hydrophilic chains containing a hydrophobic group, such as a long chain alkyl group or an alkylated allyl group, and a number (eg, 1 to about 30) of ethoxy and / or propoxy moieties. And have. Suitable nonionic surfactants include, for example, alkyl polysaccharides, block copolymers, castor oil ethoxylate, ceteole alcohol ethoxylate, cetealess alcohol ethoxylate, decyl alcohol ethoxylate, dinoylphenol ethoxylate, dodecyl. Phenol ethoxylate, end-capped ethoxylate, ether amine derivative, alkanolamide ethoxylate, ethylene glycol ester, fatty acid alkanolamide, fatty alcohol alkoxylate, lauryl alcohol ethoxylate, monobranched alcohol ethoxylate, natural alcohol ethoxylate, nonylphenyl Ethoxylate, octylphenol ethoxylate, oleylamine ethoxylate, random copoly -Alkoxylate, sorbitan ester ethoxylate, stearic acid ethoxylate, stearylamine ethoxylate, synthetic alcohol ethoxylate, tallow oil fatty acid ethoxylate, tallow amine ethoxylate, tridecanol ethoxylate, polyoxyethylene sorbitol, and mixtures thereof Is mentioned. Various specific examples of suitable nonionic surfactants include, but are not limited to, methylgluces-10, PEG-20 methylglucose distearate, PEG-20 methylglucose distearate, C _{11 15} palace-20, ceteth-8, ceteth-12, dodoxynol-12, laureth-15, PEG-20 castor oil, polysorbate 20, steareth-20, polyoxyethylene-10 cetyl ether, polyoxyethylene-10 stearyl ether , Polyoxyethylene-20 cetyl ether, polyoxyethylene-10 oleyl ether, polyoxyethylene-20 oleyl ether, ethoxylated nonylphenol, ethoxylated octylphenol, ethoxylated dodecylphenol, 3-20 ethylene oxy Ethoxylated fatty alcohol containing Sid moiety _(C 6 _{~C 22),} polyoxyethylene -20 isohexadecyl ether, polyoxyethylene -23 glycerol laurate, polyoxyethylene -20 glyceryl stearate, PPG-10 methyl glucose ether , PPG-20 methyl glucose ether, polyoxyethylene-20 sorbitan monoester, polyoxyethylene-80 castor oil, polyoxyethylene-15 tridecyl ether, polyoxy-ethylene-6 tridecyl ether, laureth-2, laureth-3 , Laureth-4, PEG-3 castor oil, PEG 600 dioleate, PEG 400 dioleate, and mixtures thereof. Commercially available nonionic surfactants include TWEEN (registered trademark), a kind of polyoxyethylene surfactant sold by Croda Uniqema, located in Newcastle, Delaware, USA, and Michigan, USA There is one type of polyoxyethylene surfactant, TRITON® (eg, TRITON® X-100) sold by Dow Chemical Co.

  Further, alkylglycoside nonionic surfactants prepared by reacting a monosaccharide or a compound hydrolyzable into a monosaccharide with an alcohol such as a fatty alcohol in an acidic medium can also be used. For example, US Pat. Nos. 5,527,892 and 5,770,543 describe alkyl glycosides and / or methods for their preparation (both patents are hereby incorporated by reference in their entirety for all purposes). Suppose). Examples of suitable commercially available alkyl glycosides include Glucopon ™ 220, 225, 425, 600 and 625 sold by Cognis Corp. of Cincinnati, Ohio. These products are mixtures of alkyl monoglucopyranosides or alkyl oligoglucopyranosides with alkyl groups based on fatty alcohols derived from coconut and / or palm kernel oil. Glucopon ™ 220, 225 and 425 are examples of particularly suitable alkyl glycosides. Glucopon ™ 220 contains an average of 1.4 glycosyl residues per molecule and an alkyl group with 8 to 10 carbon atoms (the average number of carbon atoms in the alkyl chain is 9.1) It is a mixture of alkyl polyglycosides. Glucopon ™ 225 is a related alkyl polyglycoside containing a linear alkyl group having an alkyl chain of 8 to 10 carbon atoms (the average number of carbon atoms in the alkyl chain is 9.1). Glucopon ™ 425 is a mixture of alkyl polyglycosides independently containing alkyl groups having 8, 10, 12, 14 or 16 carbon atoms (the average carbon number of the alkyl chain is 10.3). Glucopon ™ 600 is a mixture of alkyl polyglycosides that independently contain alkyl groups having 12, 14 or 16 carbon atoms (the average carbon number of the alkyl chain is 12.8). Glucopon ™ 625 is a mixture of alkyl polyglycosides that independently contain alkyl groups having 12, 14 or 18 carbon atoms (the average carbon number of the alkyl chain is 12.8). Still other suitable glycosides are commercially available from Dow Chemical Co., Midland, Michigan, USA under the trade name of TRITON® (eg, TRITON® CG-110 and BG-10). It is sold at.

  Nonionic surfactants are less likely to react with peroxides, but are not always effective in enhancing the wettability of the nonwoven web material. This reduces the amount of peroxide / peracid on the wiper, which can reduce the sterilization performance during use. Thus, in certain embodiments of the present invention, one or more ionic surfactants (eg, cationic, anionic, zwitterionic, amphoteric) can be added to the bactericidal solution alone or with a nonionic surfactant. used. As noted above, such surfactants are generally selected that do not substantially react with the peracid / peroxide in the sterilizing solution. In this regard, the present inventor has discovered that dialkyl sulfosuccinate (anionic surfactant) represented by the following chemical formula is particularly effective for use in the present invention.

In the formula, R ₁ and R ₂ independently of each other represent a linear or branched alkyl group having 3 to 22 carbon atoms, such as propyl, butyl, pentyl, hexyl, octyl, nonyl, Decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, and structural isomers thereof. In one particular embodiment, R ₁ and R ₂ are both octyl groups. As noted above, the sulfosuccinate portion of the structure above exists in anionic form, and charge neutrality is provided by the inclusion of M ⁺ species. The M ⁺ species represents any chemical species that can provide a positive charge, such as alkali metals, alkaline earth metals, ammonium ions, alkyl ammonium ions, and the like. According to certain synthetic routes for these materials, first a dialkylsulfosuccinic acid is produced, and then the produced dialkylsulfosuccinic acid is reacted with a selected alkaline material to form an anionic form of the sulfosuccinate. Accordingly, alkaline materials capable of reacting with dialkylsulfosuccinic acid to form anionic forms of sulfosuccinate are suitable for providing the cationic species defined by M ⁺ . Specific examples of such salts include sodium dicyclohexylsulfosuccinate and disodium isodecylsulfosuccinate. One suitable sodium dioctyl sulfosuccinate that is commercially available is that sold by Cytec Industries, Inc under the product name AEROSOL OT-75.

Still other suitable anionic surfactants include, for example, phosphate esters, alkyl sulfates, alkyl ether sulfates, alkyl ether sulfonates, sulfates of alkylphenoxypolyethoxyethanol, alpha olefin sulfonates, beta Alkoxyl alkane sulfonate, alkyl allyl sulfonate, alkyl monoglyceride sulfate, alkyl monoglyceride sulfonate, alkyl carboxylate, alkyl ether carboxylate, sarcosine, octanol or nonoxynol phosphate, taurate, fatty acid Tauride, fatty acid amide polyoxyethylene sulfate, isethionic acid, or mixtures thereof. Specific examples include, but are not limited _to, C 8 _{-C 18} alkyl _sulfates, C 8 _{-C 18} fatty acid salt, 1 or _C 8 _{-C 18} alkyl ether sulfate having 2 moles of ethoxylation C ₈ -C ₁₈ alkylamine oxide, C ₈ -C ₁₈ alkyl sarcosine, C ₈ -C ₁₈ sulfoacetic acid, C ₈ -C ₁₈ alkyl diphenyl oxide disulfonate, C ₈ -C ₁₈ alkyl carboxylate, C _8- C ₁₈ alpha olefin sulfonates, and mixtures thereof. C ₈ -C ₁₈ alkyl group may be linear (e.g., lauryl) or branched (e.g., 2-Echirihekishiru). The cation of the anionic surfactant can be an alkali metal (eg, sodium, potassium), ammonium, C ₁ -C ₄ alkylammonium (eg, mono-, di-, tri-), or alkanol ammonium (eg, mono-, Di-, tri-). Examples of such anionic surfactants include lauryl sulfate, octyl sulfate, 2-ethylhexyl sulfates, decyl sulfates, cocoates, lauroyl sarcosinates, linear C ₁₀ diphenyl oxide disulfonates, lauryl Sulfates (1 mole or 2 moles of ethylene oxide), myristyl sulfate, oleate, stearate, toluate, ricinoleate, cetyl sulfate, and similar surfactants.

Phosphate ester surfactants can also be used, such as, for example, mono- and di-phosphate esters of nonylphenol ethoxylate, phosphate esters of tridecyl alcohol ethoxylate, isodecyl ethoxy phosphoric acid esters of rates, other phosphate esters of aromatic ethoxylates and aliphatic ethoxylates, phosphate esters of C ₁₀ -C ₁₆ alkyl ethoxylates / propoxylates, and mixtures thereof. Non-limiting examples of other suitable phosphates having at least one phosphate group and salts thereof include phosphorous acid-containing acids (eg, phosphoric acid, phosphorous acid, hypophosphorous acid, orthophosphoric acid, pyrotrilin) Acid, triphosphoric acid, metaphosphoric acid), monomethyl phosphate, monoethyl phosphate, mono-n-butyl phosphate, dimethyl phosphate, diethyl phosphate, ethyl ester of phosphorous acid, phosphorous acid-containing acid Other esters and mixtures thereof are mentioned. Other examples of such surfactants are described in US Patent Application No. 2006/0047062 by Hsu et al. (Which is hereby incorporated by reference in its entirety for all purposes). To be incorporated). Commercially available products include Rhodafac (registered trademark) PE-510, RE-410, RE-610, RE-960, RK-500A, RS-410, RS-610, manufactured by Rhodia Inc. RS-610A-25, RS-710, and RS-960, Dextrol ™ OC-110, OC-15, OC-40, OC-60 manufactured by Hercules, Inc., Wilmington, Del. And OC-70, Tryfac (registered trademark) 5553 and 5570 manufactured by Cognis Corporation, Klearfac (registered trademark) AA 270, Lutensit (registered trademark) and Maphos (registered trademark) manufactured by BASF Corporation (BASF Corporation), etc. As well as mixtures thereof.

  Amphoteric surfactants can also be used, such as having a linear or branched aliphatic group, one of the aliphatic substituents being about 8-18. Examples thereof include secondary amine or tertiary amine derivatives having carbon atoms and at least one of the aliphatic substituents having an anionic water-soluble group (carboxyl group, sulfonate, sulfate group, etc.). Some examples of amphoteric surfactants include, but are not limited to, sodium 3- (dodecylamino) propionate, sodium 3- (dodecylamino) propane-1-sulfonate, 2- (dodecyl) Amino) ethyl sodium acetate, 2- (dimethylamino) octadecanoate sodium, 3- (N-docarboxymethyl-dodecylamino) propane-1-sulfonic acid disodium, octadecyliminodiacetic acid disodium, 1-carboxymethyl 2-undecylimidoazole sodium and N, N-bis (2-hydroxyethyl) -2-sulfate-3-dodecoxypropylamine. Additional types of amphoteric surfactants include phosphobetaines and phosphitaines. Some examples of such amphoteric surfactants include, but are not limited to, for example, cocoyl N methylmethyl taurine sodium, oleyl N methyl methyl taurine sodium, tall oil acid N methyl methyl taurine sodium, Palmitoyl N-methylmethyltaurine sodium, cocodimethylcarboxylmethylbetaine, lauryldimethylcarboxymethylbetaine, lauryldimethylcarboxyethylbetaine, cetyldimethylcarboxymethylbetaine, lauryl-bis- (2-hydroxyethyl) carboxymethylbetaine, oleyldimethylgammacarboxypropyl Betaine, lauryl-bis- (2-hydroxypropyl) carboxyethylbetaine, cocoamidodimethylpropylsultain, stearylamine Dimethylpropylsultain, laurylamide-bis- (2-hydroxyethyl) propylsultain, cocoamphoglycinate, cocoamphocarboxyglycinate, laurylamphoglycinate, laurylamphocarboxyglycinate, Capryloamphocarboxyglycinate, cocoamphopropionate, cocoamphocarboxypropionate, laurylamphocarboxypropionate, capryloamphocarboxypropionate, dihydroxyethyl tallow glycinate, cocoamide disodium 3-hydroxypropyl phosphobetaine, lauric myristamide amide disodium 3-hydroxypropyl phosphobetaine, lauric myristamide glyceryl phosphobetaine, lauric myristate Amide carboxyl disodium 3-hydroxypropyl phosphobetaine, cocoamidopropyl monosodium phosphobetaine, lauric myristic tick amidopropyl monosodium phosphobetaine, and mixtures thereof.

  In addition, quaternary ammonium compounds (for example, cetyltrimethylammonium chloride, benzalkonium chloride, benzethonium chloride, quaternium-18, stearalkonium chloride, cocotrimonium methosulfate, PEG-2 cocomonium chloride, PEG-3 di Cationic surfactants such as oleoylamidoethylmonium methosulfate) can also be used in the present invention.

  The total amount of surfactant in the sterilizing solution is generally about 0.001% to about 2% by weight, and in one embodiment about 0.002% to about 1% by weight, based on the weight of the sterilizing solution. In some embodiments, from about 0.005% to about 0.5% by weight. Although any surfactant can generally be used, the bactericidal solution of the present invention may contain at least one nonionic surfactant as described above. When a nonionic surfactant is used, the nonionic surfactant is present in about 0.001 to 0.5% by weight of the sterilizing solution, in some embodiments about 0.002 to 0.2% by weight. The form constitutes about 0.005 to 0.1% by weight. Similarly, anionic surfactants (eg, dialkyl sulfosuccinates, phosphate esters, etc.) are about 0.001-0.5% by weight of the bactericidal solution, and in embodiments about 0.002-0.2. % By weight, in one embodiment about 0.001 to 0.1% by weight.

  D. Other ingredients

The sterilizing solution may also include various other components in addition to the components described above. For example, one or more carboxylic acids can be included in the germicidal solution in an amount effective to establish an equilibrium with the peracid. Although it can be included in various amounts, the carboxylic acid is generally about 0.5 to 15% by weight, in some embodiments about 1 to 10% by weight, and in some embodiments about 1 to 10% by weight, based on the weight of the germicidal solution. It is present in an amount of 2-8% by weight, and in some embodiments about 3-6% by weight. Carboxylic acids are generally basic acids from which peracids are derived. Suitable acids include, for example, C ₁ -C ₉ carboxylic acids, in particular C ₁ -C ₅ carboxylic acids. Examples of such acids include formic acid, acetic acid, benzoic acid, propionic acid, nonanoic acid and halogen-substituted acids (eg monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoroacetic acid, metachlorobenzoic acid), and mixtures thereof Etc. If desired, salts of these acids are also used. In one particular embodiment, acetic acid is used to establish an equilibrium with peracetic acid.

  Water soluble polymers can also be used to adjust the rheological properties of the sterilizing solution and to enhance the overall efficacy of the sterilizing solution. Such polymers can be used, for example, in amounts of 0.1-1%. Particularly suitable polymers are vinyl polymers containing lactam groups (eg polyvinylpyrrolidone). Details of such polymers are described in Martin et al., PCT International Publication No. WO2006 / 076334, and Martin et al., US Patent Application No. 2006/0229225, both patents being incorporated for all purposes. This reference is incorporated herein in its entirety).

  Since sterilizing solutions are exposed to metal impurities (eg, calcium ions in water) during their use, metal chelators are used in the sterilizing solution. The metal chelator is used in the sterilizing solution in an amount of, for example, 0.05 to 10 wt%, in some embodiments 0.1 to 5 wt%, and in some embodiments 0.5 to 4 wt%. While not intending to be bound by theory, it is believed that metal chelators limit premature release of active peroxide by adjusting the exposure of peroxide to metal ions. Examples of the metal chelating agent include aminocarboxylic acids (for example, ethylenediaminetetraacetic acid) and salts thereof, hydroxycarboxylic acids (for example, citric acid, tartaric acid, ascorbic acid) and salts thereof, and polyphosphoric acids (for example, tripolyphosphoric acid, hexapolyphosphoric acid). Acid) and salts thereof, and cyclodextrin. Desirably, the chelator can form a multi-coordination complex with the metal ion, thereby reducing the likelihood that the free metal ion will interact with the peroxide. In one embodiment, for example, a chelating agent is used that contains two or more aminodiacetic acid groups or salts thereof. The aminodiacetic acid group generally has the following structure:

  An example of such a chelating agent is ethylenediaminetetraacetic acid (EDTA). Examples of suitable EDTA include EDTA calcium disodium, EDTA diammonium, EDTA disodium and dipotassium, EDTA triethanolamine, EDTA trisodium and tripotassium, EDTA tetrasodium and tetrapotassium. Still other examples of similar aminodiacetic acid-based chelating agents include, but are not limited to, butylenediamine tetraacetic acid, 1,2-cyclohexylenediaminetetraacetic acid (CyDTA), diethylenetriaminopentaacetic acid, ethylenediaminetetrapropionic acid, (Hydroxyethyl) ethylenediaminetriacetic acid (HEDTA), N, N, N ′, N′-ethylenediaminetetra (methylenephosphonic acid) (EDTMP), triethylenetetraminehexaacetic acid (TTHA), 1,3-diamino-2-hydroxy Examples include propane-N, N, N ′, N′-tetraacetic acid (DHPTA), methyliminodiacetic acid, propylenediaminetetraacetic acid and the like.

  The sterilizing solution of the present invention may include various other optional components in addition to the components described above. For example, the sterilizing solution may include a preservative or preservative system for inhibiting the growth of pathogens over a long period of time. Suitable preservatives for use in disinfecting solutions include, for example, Kathon CG® from Rohm & Haas, which is a mixture of methylchloroisothiazolinone and methylisothiazolinone. , Neolone 950 (registered trademark) manufactured by Rohm & Haas, which is methylisothiazolinone, Mackstat H 66 (available from McIntyre Group, Chicago, Illinois, USA), DMDM hydantoin ( For example, Glydant Plus from Lonza, Inc., Fairlawn, NJ, USA, iodopropynyl butylcarbamate, benzoate (paraben) (eg, methylparaben, propylparaben, butylparaben, ethylparaben, Isopropyl paraben, isobutyl paraben, benzyl paraben, methyl paraben natri Um, propylparaben sodium), 2-bromo-2-nitropropane-1,3-diol, benzoic acid, imidazolidinyl urea, diazolidinyl urea and the like. Still other preservatives include ethylhexyl glycerin (Sensiva SC 50 from Schulke & Mayr), phenoxyethanol (Phenoxyethanol from Tri-K Industries), caprylyl glycol (Lexgard O from Inolex Chemical Company), Symdiol 68T (A mixture of 1,2-hexanediol, caprylyl glycol, and tropolone, manufactured by Symrise), Symocide PT (a mixture of phenoxyethanol and tropolone, manufactured by Symrise), and the like.

  The sterilizing solution may also include various components known in the art, such as binders, colorants, electrolyte salts, pH adjusters, fragrances and the like. Various other possible ingredients are described in US Pat. No. 5,681,380 by Nohr et al. And US Pat. No. 6,524,379 by Nohr et al. (Both patent references are hereby incorporated by reference for all purposes). The entirety of which is incorporated herein).

  In order to prepare a sterilizing solution, typically one or more components are dissolved or dispersed in a solvent (eg, water). For example, a sterilizing solution is prepared by mixing one or more of the above components in sequence or simultaneously with a solvent. The actual concentration of solvent used will generally depend on the nature of the sterilizing solution and its components, but is generally about 50-99.9% by weight, in certain embodiments, based on the weight of the sterilizing solution. It is present in an amount of about 60-99% by weight, and in one embodiment about 75-98% by weight.

  Although organic peracids, peroxides and surfactants are desirably mixed together before the sterilization solution is incorporated into the wiper, some components of the sterilization solution may be replaced with the wiper instead of being premixed in the sterilization solution. It should be understood that it can be added after configuration. For example, in one embodiment, the wiper is initially configured to include the surfactant described above. This wiper is then packaged and provided to the user, and the sterilizing solution of the present invention is prepared by the user adding, for example, an organic peracid and / or peroxide.

  II. Wiper

  The wiper of the present invention comprises a substantially hydrophobic nonwoven web material made from a melt extrudable synthetic polymer. Such polymers include, for example, polyolefins (eg polyethylene, high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, etc.), polypropylene (isotactic polypropylene, atactic polypropylene, syndiotactic polypropylene, etc.) , Polybutylene (poly (i-butene), poly (2-butene), etc.), polypentene (poly (i-pentene), poly (2-pentene), etc.), poly (3-methyl-1-pentene), poly ( 4-methyl-1-pentene), and copolymers thereof, and mixtures thereof. Suitable copolymers include random copolymers and block copolymers made from two or more different unsaturated olefinic monomers (eg, ethylene / propylene copolymers, ethylene / butylene copolymers, etc.). If desired, elastomeric polymers such as, for example, elastomeric polyolefins, elastomeric copolymers can also be used. Examples of the elastomeric polymer include block copolymers represented by a general formula A-B-A 'or A-B. A and A ′ in the formula are thermoplastic polymer endblocks containing a styrene moiety and B is a midblock of an elastomeric polymer such as a conjugated diene or lower alkene polymer. Such copolymers include, for example, styrene-isoprene-styrene (S-I-S), styrene-butadiene-styrene (S-B-S), styrene-ethylene-butadiene-styrene (S-EB-S), Examples thereof include styrene-isoprene (SI) and styrene-butadiene (SB). Commercially available AB-A 'and AB copolymers include various Ss sold under the trade name KRATON from Kraton Polymers of Houston, Texas. -There is an EB-S composition. KRATON® block copolymers are sold as various compositions, some of which are described in US Pat. Nos. 4,663,220, 4,323,534, 4,834,738, 5,093,422 and 5,304,599. (These patent documents are hereby incorporated by reference in their entirety for all purposes). Another commercially available block copolymer is S-EP-S elastomeric copolymer sold under the trade name SEPTON (registered trademark) by Kuraray Company, Ltd., located in Okayama, Japan. . Still other suitable copolymers include S-I-S and S-B-S sold under the trade name VECTOR® from Dexco Polymers of Houston, Texas. . Also, for example, as discussed in US Pat. No. 5,332,613 by Taylor et al., Which is hereby incorporated by reference in its entirety for all purposes. Also suitable are polymers composed of -B-A-B tetrablock copolymers. An example of such a tetrablock copolymer is a styrene polymer (ethylene propylene) -styrene-poly (ethylene-propylene) ("S-EP-S-EP") block copolymer.

  Examples of elastomeric polymers include ultra-low density elastomeric polypropylene and polyethylene, such as those produced by “single site” or “metallocene” catalytic processes. Such elastomeric olefin polymers are available from ExxonMobil Chemical Co., Houston, Texas, USA, from ACHIEVE® (propylene-based), EXACT® (ethylene-based), EXCEED ( Some products are sold under the trade name (registered trademark) (ethylene-based). In addition, as an elastomeric olefin polymer, ENGAGE (registered trademark) from DuPont Dow Elastomers, LLC (a joint project of DuPont and Dow Chemical Co.) ( Some products are sold under the trade name of (Ethylene), and others are sold under the AFFINIT (registered trademark) trade name from Dow Chemical Company, Midland, Michigan, USA. Examples of such polymers are described in US Pat. Nos. 5,278,272 and 5,272,236 by Lai et al. (Both patent documents are incorporated herein by reference in their entirety for all purposes). And). The elastomeric polypropylenes described in Yang et al. US Pat. No. 5,539,056 and Resconi et al. US Pat. No. 5,596,052 can also be used (both patents are hereby incorporated by reference in their entirety for all purposes). Are incorporated herein).

  The nonwoven web material can be manufactured using any of a variety of methods. Referring to FIG. 1, for example, one embodiment of a method for producing a meltblown web is shown. The meltblown web has a small average pore size that allows gas (eg, air, water vapor) to pass but not liquids and particles. In order to obtain the desired pore size, meltblown fibers are typically “superpolar fibers” having an average diameter of 10 micrometers or less, in some embodiments about 7 micrometers or less, and in some embodiments about 5 micrometers or less. is there. The ability to produce such fine fibers is facilitated in the present invention by the use of a thermoplastic composition having the desired combination of low apparent clay and high melt flow rate.

  In FIG. 1, for example, raw materials (for example, polymer, opacifier, carrier resin, etc.) are supplied from the hopper 10 to the extruder 12. Raw materials can be provided to the hopper 10 using any conventional technique and in any state. The extruder 12 is driven by the motor 11 and heated to a temperature sufficient to extrude the molten polymer. For example, the extruder 12 uses one or more regions that operate at a temperature of about 50-500 ° C, in some embodiments about 100-400 ° C, and in some embodiments about 150-250 ° C. Typical shear rates range from about 100 to 10,000 / second, in some embodiments from about 500 to 5,000 / second, and in some embodiments from about 800 to 1200 / second. If desired, the extruder can also have one or more zones (eg, vacuum zones) for removing excess moisture from the polymer. The extruder can also be vented to escape volatile gases.

  The formed thermoplastic composition is then fed to another extruder on the fiber production line (extruder 12 on the meltblown spinning line). Alternatively, the thermoplastic composition is formed directly into fibers by feeding it to a die 14 heated by a heater 16. It should be understood that other meltblown die chips can be used. As the polymer is discharged from the die 14 through the orifice 19, the polymer stream is thinned and dispersed by the high pressure fluid (eg, heated air) supplied through the conduit 13 to form the ultrafine fibers 18.

  The ultrafine fibers 18 are randomly deposited on the perforated surface 20 (driven by rolls 21 and 23) with the help of an optional suction box 15 to form a meltblown web 22. In order to improve the uniformity of fiber deposition, the distance between the die chip and the perforated surface 20 is generally set small. For example, the spacing is about 1-35 cm, and in some embodiments about 2.5-15 cm. The direction of the arrow 28 in FIG. 1 indicates the web forming direction (ie, “machine direction”), and the direction of the arrow 30 indicates the direction orthogonal to the machine direction (ie, “cross machine direction”). Optionally, the meltblown web 22 can then be clamped by rolls 24 and 26. The denier value of the fiber can vary depending on the desired application. Typically, the fibers have a DPF (denier per filament) (ie, a unit of linear density equivalent to gram weight per 9000 meters of one fiber) of less than about 6, and in some embodiments less than about 3. In some embodiments, it is made to be about 0.5-3. In addition, the fibers generally have an average diameter of about 0.1-20 μm, in some embodiments about 0.5-15 μm, and in some embodiments about 1-10 μm.

  The formed nonwoven web is then bonded using any conventional technique such as adhesive or self-bonding (eg, fiber-to-fiber fusion and / or self-bonding without the application of an external adhesive). The For example, self-bonding can be accomplished by bringing the fibers into contact with each other while the fibers are in a semi-molten or sticky state, or simply mixing a tackifying resin and / or solvent with the polymer used to form the fibers. Is achieved. Suitable self-bonding techniques include ultrasonic bonding, thermal bonding, through-air bonding, and calendar bonding. For example, the web is further joined by a thermomechanical process of passing the web between a heated smooth anvil roll and a heated pattern roll, and the pattern is embossed. The pattern roll has any raised pattern that provides the desired web properties or appearance. The pattern roll desirably has a raised pattern that defines a plurality of joint locations such that the joint area is approximately 2-30% of the total roll area. Exemplary bonding patterns include, for example, U.S. Pat.No. 3,855,046 by Hansen et al., U.S. Pat.No. 5,620,779 by Lew et al., U.S. Pat.No. 5,962,112 by Havnes et al., U.S. Pat.No. 6,093,665 by Sayovitz et al., U.S. Pat. Design Patent No. 428,267, U.S. Design Patent No. 390,708 by Brown, U.S. Design Patent No. 418,305 by Zander et al., U.S. Design Patent No. 384,508 by Zander et al., U.S. Design Patent No. 384,819 by Zander et al., U.S. Design Patent by Zander et al. Including those described in US Pat. No. 358,035 and US Design Patent No. 315,990 by Blenke et al. (These patent documents are incorporated herein by reference in their entirety for all purposes). To do). The pressure between the two rolls is about 5 to 2000 pounds per linear inch (about 0.09 to 35.72 kg per mm). The pressure between the two rolls and the temperature of the two rolls are adjusted to achieve the desired web properties and appearance while maintaining the cloth-like properties. As is well known to those skilled in the art, the required temperature and pressure include, but are not limited to, various areas such as pattern bonding area, polymer properties, fiber properties, and nonwoven properties. Various settings can be made according to various factors.

  In addition to meltblown webs, various other nonwoven webs such as spunbond webs and bonded carded webs can also be made from the thermoplastic composition. For example, the polymer is extruded from a spinneret, quenched, and drawn into a substantially continuous single fiber that is randomly deposited on the forming surface. Alternatively, a carded web is formed from the polymer by placing a fiber bundle formed from the thermoplastic composition into a fiber separation picker. The fibers are then fed through a combing or carding device that further separates the fibers and aligns them in the machine direction, thereby forming a fiber nonwoven web oriented in the machine direction. The formed nonwoven web material is generally stabilized by one or more known joining techniques.

  If desired, the nonwoven web material can also be made by a mechanical joining method in which the fibers are entangled with each other with the help of a thin jet of air or liquid to form inter-entangled fibers. Details of this method are described in US Pat. No. 3,486,168 by Evans et al., Which is hereby incorporated by reference in its entirety for all purposes. Such entangled materials (also referred to as “spunlace materials”) have significant fabric-like properties.

  The nonwoven web can also be a composite that includes a combination of a thermoplastic composition and other types of fibers (eg, short fibers, ultrafine fibers, etc.). For example, additional synthetic staple fibers formed from polyolefins (polyethylene, polypropylene, polybutylene, etc.) can be used. The nonwoven web can also have a multilayer structure. Suitable multilayer materials include, for example, spunbond / meltblown / spunbond (SMS) laminates, spunbond / meltblown (SM) laminates. Various examples of suitable SMS laminates are US Pat. No. 4,041,203 by Brock et al., US Pat. No. 5,213,881 by Timmons et al., US Pat. No. 5,464,688 by Timmons et al., US Pat. No. 4,374,888 by Bornslaeqer, US by Collier et al. No. 5,169,706, U.S. Pat. No. 4,766,029 by Brock et al., Which are hereby incorporated by reference in their entirety for all purposes. In addition, commercially available SMS laminates are available from Kimberly-Clark Corporation under the trade names Spunguard® and Evolution®.

  Regardless of the material or method used to make the wiper, the basis weight of the wiper is typically about 10-200 gsm (grams per square meter), and in one embodiment about 20-100 gsm. A product with a small basis weight is particularly suitable for use as a wiper for light work, and a product with a large basis weight is suitable for use as an industrial wiper. The wiper can take various shapes such as, but not limited to, substantially circular, oval, square, rectangular or irregular shapes. Each industrial wiper is configured in a folded configuration and stacked on top of each other to provide a stack of wet wipers. Such a folding structure is well known in the art, and includes, for example, a C-shaped folding structure, a Z-shaped folding structure, and a four-fold folding. For example, the wiper has a deployed length of about 2.0-80.0 cm, and in one embodiment about 10.0-40.0 cm. Similarly, the wiper has a deployed width of about 2.0-80.0 cm, and in one embodiment about 10.0-40.0 cm. To provide a wiper package that is ultimately sold to the consumer, the folded stack of wipers is housed in a container, such as a plastic tab-type container. Alternatively, the wiper may be configured as an elongated continuous material with perforations formed between each wipe and stacked on each other or wound on a supply roll. Various suitable dispensers, containers and systems for supplying wipers are disclosed in U.S. Pat.No. 5,785,179 by Buczwinski et al., U.S. Pat.No. 5,964,351 by Zander, U.S. Pat.No. 6,030,331 by Zander, U.S. Pat. Huang et al., US Pat. No. 6,269,969, Huang et al. US Pat. No. 6,269,970, Newman et al. US Pat. No. 6,273,359, which are hereby incorporated by reference in their entirety for all purposes. Are incorporated herein).

  The sterilizing solution is applied to the wiper using any of a variety of methods known in the art such as spraying, dipping, infiltration, impregnation, brushing, and the like. The amount of sterilizing solution depends on the type of wiper material used, the type of container containing the wiper, the nature of the cleaning composition, and the desired end use of the wiper. Generally, each wiper is about 150% to 1000% by weight, and in some embodiments about 250% to 750% by weight, based on the dry weight of the nonwoven web material used to make the wiper. The form contains about 350% to 650% sterilizing solution.

  The wiper for disinfection of the present invention can be used on any surface (restaurant counter, table, medical device, high frequency contact surface, bathroom counter, toilet, laboratory bench, bed rail, telephone, door knob, etc.) It can be used for disinfection and / or disinfection. As mentioned above, the inventor has discovered that the stability of the germicidal solution and the wettability of the wiper can be enhanced by selectively adjusting the components and relative amounts used in the germicidal solution, as well as the properties of the wiper itself. did. By maximizing both stability and wettability in this manner, the sterilizing wiper becomes very effective against the pathogen when exposed to a wide range of pathogens. Examples of pathogens that can be suppressed include bacteria (cyanobacteria, mycobacteria, bacterial spores), lichens, microbes, protozoa, virinos, viroids, viruses, fungi (fungi, yeast), and algae. For example, wipers can be effective against several medically important bacterial groups, such as Gram negative bacilli (intestinal bacteria), Gram negative bacilli (eg , Helicobacter, Campylobacter), Gram-negative cocci (Nisseria), Gram-positive bacilli (Bacillus, Clostridium), Gram-positive cocci (staphylococci, streptococci), obligate intracellular parasites (Riqueccia, Chlamydia) Acid-fast bacilli (Mycobacterium spp., Nocardia spp.), Spirochetes (Treponema spp., Borrelia spp.), And mycoplasma (i.e., microbacteria without cell walls). Specific types of bacteria that can be suppressed include Escherichia coli (Gram-negative bacilli), Klebsiella pneumoniae (Gram-negative bacilli), Streptococcus (Gram-positive cocci), Vibrio cholerae (Gram-negative bacilli), Staphylococcus aureus (Gram-positive) Staphylococci), and Pseudomonas aeruginosa (gram-negative bacilli). Examples of other pathogens other than bacteria include fungi (black Aspergillus), yeasts contained in the fungus kingdom (Candida albicans), viruses such as lipid viruses (HIV, RSV), non-lipid viruses (Polio, rhinovirus) Norovirus, hepatitis A).

  When exposed for a period of time, the wiper has a logarithm of at least about 2, in some embodiments at least about 3, in some embodiments at least about 4, in some embodiments at least about 5 (eg, about 6). Indicates a decrease. The logarithmic decrease is obtained from, for example, the kill rate (%) by the composition according to the following relationship.

  According to the present invention, such log reduction is achieved with a relatively short exposure time. For example, the desired log reduction is achieved after an exposure of only 30 minutes, in some embodiments 10 minutes, in some embodiments 5 minutes, in some embodiments 1 minute, and in some embodiments 15 seconds.

  The invention can be better understood with reference to the following examples.

  Example

  A series of pre-saturated wiper samples were made by saturating the treated polypropylene fibrous meltblown sheet with a solution containing about 4.3% hydrogen peroxide and 0.20% peracetic acid. For the treatment of nonwoven substrates, untreated, treatment with a mixture of a cationic surfactant (quaternary ammonium compound) and a nonionic surfactant, a nonionic surfactant and an anionic surfactant Treatment with a mixture, treatment with a nonionic surfactant, and treatment with an anionic surfactant. For control, an experiment was also conducted on a cellulosic substrate sheet. The nonwoven substrate sample is saturated with a 500 wt% solution for polypropylene and 350 wt% solution for cellulose. The sample was then placed in a prepared high density polyethylene (HDPE) container and held at room temperature or held in a oven at 40 ° C. for 14-30 days. An aliquot of the solution was used as a control and kept in the same environment. The results of the experiment are shown below.

  Except for Examples 4 and 5, peracetic acid and hydrogen peroxide were decomposed.

  Example 5 uses an industry standard test method to evaluate the bactericidal activity of pre-saturated wet tissue on non-porous hard surfaces, and demonstrates the effective activity against a wide range of pathogens. A test was also conducted. For viruses, quantitative virucidal activity based on ASTM standard methods was used, and for residual microorganisms, a quantitative carrier test was used. A summary of the log reduction and / or killing of microorganisms and the corresponding contact time in the experiment in Example 5 is given below.

Although the invention has been described in detail in terms of particular embodiments, it will be apparent to those skilled in the art that modifications, variations, and equivalents of these embodiments can be readily devised if the above points are understood. is there. Accordingly, the scope of the invention should be defined by the appended claims and their equivalents.

Claims (24)

A wet wiper for disinfection,
Consisting of a substantially hydrophobic nonwoven web material comprising a melt extrudable synthetic polymer,
From about 0.01% to about 2% by weight of at least one peracid, from about 0.5% to about 15% by weight of at least one peroxide, and from about 0.001% to about 2% by weight; A wet wiper comprising a sterilizing solution containing at least one surfactant in an amount of about 150 wt% to about 1000 wt%, based on the dry weight of the nonwoven web material. The wet wiper for sterilization according to claim 1,
The peracid is formic acid, peracetic acid, perbenzoic acid, perpropionic acid, pernonanoic acid, monochloroperacetic acid, dichloroperacetic acid, trichloroperacetic acid, trifluoroperacetic acid, metachloroperoxybenzoic acid, or a mixture thereof Wet wiper characterized by including. The wet wiper according to claim 1 or 2,
The wet wiper characterized in that the peracid contains peracetic acid. The wet wiper according to claim 1, wherein
The peroxide is hydrogen peroxide, lithium peroxide, potassium peroxide, sodium peroxide, magnesium peroxide, calcium peroxide, barium peroxide, carbamide peroxide, tert-butyl peroxide, diphenyl peroxide, peroxide. A wet wiper comprising benzoyl or a mixture thereof. The wet wiper according to claim 1, wherein
The wet wiper, wherein the peroxide contains hydrogen peroxide. The wet wiper according to claim 1,
The wet wiper, wherein the sterilizing solution contains about 1 wt% to about 10 wt% of the peroxide. The wet wiper according to claim 1, wherein
The wet wiper, wherein the sterilizing solution contains about 0.05 wt% to about 1 wt% of the peracid. The wet wiper according to claim 1,
The wet wiper, wherein the surfactant contains a nonionic surfactant. The wet wiper according to claim 1, wherein
The wet wiper, wherein the surfactant contains an anionic surfactant. The wet wiper according to claim 9,
The wet wiper characterized by the said anionic surfactant containing the dialkyl sulfo succinate represented by the following general formula.

(In the formula, R ₁ and R ₂ each independently represent a linear or branched alkyl group having 3 to 22 carbon atoms, and M represents an alkali metal, an alkaline earth metal, or ammonium. Or alkylammonium) The wet wiper according to claim 9,
The wet wiper, wherein the anionic surfactant contains sodium dioctyl sulfosuccinate. The wet wiper according to claim 1,
The wet wiper, wherein the sterilizing solution contains about 0.002 wt% to about 1 wt% of the surfactant. The wet wiper according to claim 1, wherein
The wet wiper, wherein the sterilizing solution further contains an amount of at least one carboxylic acid effective to establish an equilibrium with the peracid. The wet wiper according to claim 1, wherein
A wet wiper wherein about 75% to about 98% by weight of the sterilizing solution is composed of water. The wet wiper according to claim 1,
The wet wiper, wherein the sterilizing solution is present in an amount of about 300 wt% to about 600 wt%, based on the dry weight of the nonwoven web material. The wet wiper according to claim 1, wherein
The wet wiper wherein the nonwoven web material comprises a meltblown web, a spunbond web, or a combination thereof. The wet wiper according to any one of claims 1 to 16,
The wet wiper, wherein the synthetic polymer contains a polyolefin. A method for sterilizing a hard surface,
About 0.01% to about 2% by weight of at least one peracid, about 0.5% to about 15% by weight of at least one peroxide and about A wet wiper comprising a sterilizing solution containing 0.001% to about 2% by weight of at least one surfactant in an amount of about 150% to about 1000% by weight of the dry weight of the nonwoven web material; A method comprising the step of contacting the surface. The method according to claim 18, comprising:
The method wherein the peracid comprises peracetic acid and the peroxide comprises hydrogen peroxide. The method according to claim 18, comprising:
The method wherein the sterilizing solution contains from about 1% to about 10% by weight of the peroxide and from about 0.05% to about 1% by weight of the peracid. The method according to claim 18, comprising:
The method wherein the surfactant comprises an anionic surfactant, a nonionic surfactant, or a combination thereof. The method according to claim 18, comprising:
About 75% to about 98% by weight of the sterilizing solution is composed of water. The method according to claim 18, comprising:
The method wherein the sterilizing solution is present in an amount of about 300 wt% to about 600 wt%, based on the dry weight of the nonwoven web material. The method according to claim 18, comprising:
A method wherein a log reduction of 3 or more is achieved for at least one pathogen.

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